Display device

ABSTRACT

A display device including a display panel; an optical layer behind the display panel; and a frame behind the optical layer. Further, the frame includes a flange supporting a portion of a back surface of the optical layer; a first rib extended from the flange and configured to contact and support a side surface of the optical layer; and a second rib extended from the flange and positioned to be spaced apart from the side surface of the optical layer.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 15/639,032, filed on Jun. 30, 2017, which claims the benefit of earlier filing date and right of priority to Korean Patent Application No. 10-2016-0084037, filed on Jul. 4, 2016, the contents of which are all hereby incorporated by reference herein in their entirety.

BACKGROUND OF THE INVENTION Field of the Invention

The present disclosure relates to a display device.

Discussion of the Related Art

With the development of the information society, various demands for display devices have been increasing. Various display devices, such as, e.g., liquid crystal displays (LCDs), plasma display panels (PDPs), electroluminescent displays (ELDs), and vacuum fluorescent displays (VFDs), have been studied and used to meet various demands for the display devices.

Among the display devices, a liquid crystal display panel of the liquid crystal display includes a liquid crystal layer, and a thin film transistor (TFT) substrate and a color filter substrate which are positioned opposite each other with the liquid crystal layer interposed therebetween. The liquid crystal display panel displays an image using light provided by a backlight unit of the liquid crystal display.

SUMMARY OF THE INVENTION

Accordingly, an object of the present disclosure is to address the above-described and other problems.

Another aspect of the present disclosure is to provide a display device capable of maintaining initial image quality by improving durability of the display device.

Another aspect of the present disclosure is to provide a display device capable of varying an arrangement of light sources of a backlight unit.

Another aspect of the present disclosure is to provide a display device capable of improving light efficiency of a backlight unit.

Another aspect of the present disclosure is to provide a display device capable of securing structural rigidity of a slim frame.

Another aspect of the present disclosure is to provide a display device capable of improving a support structure of an optical layer.

Another aspect of the present disclosure is to provide a display device capable of improving the assembly convenience of a holder and preventing the detachment of the holder.

Another aspect of the present disclosure is to provide a display device capable of improving the durability against an external impact.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, the present invention provides in one aspect a display device including a display panel; an optical layer behind the display panel; and a frame behind the optical layer. Further, the frame includes a flange supporting a portion of a back surface of the optical layer; a first rib extended from the flange and configured to contact and support a side surface of the optical layer; and a second rib extended from the flange and positioned to be spaced apart from the side surface of the optical layer.

Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIGS. 1 to 5 illustrate examples of a display device related to the present disclosure;

FIGS. 6, 7A, 7B to 9 illustrate examples of a frame according to one embodiment;

FIGS. 10 to 17 illustrate examples of the coupling of light sources according to one embodiment;

FIGS. 18 to 21 illustrate examples of a frame according to one embodiment;

FIGS. 22 to 29 illustrate examples of the arrangement of light sources according to one embodiment;

FIGS. 30 to 38 illustrate examples of the coupling and the arrangement of light sources according to one embodiment;

FIGS. 39 to 46B illustrate examples of an edge of a frame according to one embodiment;

FIG. 47 illustrates an example of a cross section of a display device according to one embodiment;

FIG. 48 illustrates an example of a display device according to one embodiment;

FIGS. 49 and 50 illustrate examples of fixing a member layer of a display device according to one embodiment; and

FIGS. 51 to 54 illustrate examples of fixing a member layer of a display device according to one embodiment.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Reference will now be made in detail embodiments of the invention examples of which are illustrated in the accompanying drawings. Since the present invention may be modified in various ways and may have various forms, specific embodiments are illustrated in the drawings and are described in detail in the present specification. However, it should be understood that the present invention are not limited to specific disclosed embodiments, but include all modifications, equivalents and substitutes included within the spirit and technical scope of the present invention.

The terms ‘first’, ‘second’, etc. may be used to describe various components, but the components are not limited by such terms. The terms are used only for the purpose of distinguishing one component from other components. For example, a first component may be designated as a second component without departing from the scope of the present invention. In the same manner, the second component may be designated as the first component.

The term “and/or” encompasses both combinations of the plurality of related items disclosed and any item from among the plurality of related items disclosed. When an arbitrary component is described as “being connected to” or “being linked to” another component, this should be understood to mean that still another component(s) may exist between them, although the arbitrary component may be directly connected to, or linked to, the second component. In contrast, when an arbitrary component is described as “being directly connected to” or “being directly linked to” another component, this should be understood to mean that no component exists between them.

The terms used in the present application are used to describe only specific embodiments or examples, and are not intended to limit the present invention. A singular expression can include a plural expression as long as it does not have an apparently different meaning in context. In the present application, the terms “include” and “have” should be understood to be intended to designate that illustrated features, numbers, steps, operations, components, parts or combinations thereof exist and not to preclude the existence of one or more different features, numbers, steps, operations, components, parts or combinations thereof, or the possibility of the addition thereof.

Unless otherwise specified, all of the terms which are used herein, including the technical or scientific terms, have the same meanings as those that are generally understood by a person having ordinary knowledge in the art to which the present invention pertains. The terms defined in a generally used dictionary must be understood to have meanings identical to those used in the context of a related art, and are not to be construed to have ideal or excessively formal meanings unless they are obviously specified in the present application.

The following exemplary embodiments of the present invention are provided to those skilled in the art in order to describe the present invention more completely. Accordingly, shapes and sizes of elements shown in the drawings may be exaggerated for clarity.

Hereinafter, the embodiments of the invention are described using a liquid crystal display panel as an example of a display panel. Other display panels may be used. For example, a plasma display panel (PDP), a field emission display (FED) panel, and an organic light emitting diode (OLED) display panel may be used.

In what follows, a display device 100 may include a first long side LS1, a second long side LS2 opposite the first long side LS1, a first short side SS1 adjacent to the first long side LS1 and the second long side LS2, and a second short side SS2 opposite the first short side SS1.

In the embodiment disclosed herein, the first short side SS1 may be referred to as a first side area; the second short side SS2 may be referred to as a second side area opposite the first side area; the first long side LS1 may be referred to as a third side area which is adjacent to the first side area and the second side area and is positioned between the first side area and the second side area; and the second long side LS2 may be referred to as a fourth side area which is adjacent to the first side area and the second side area, is positioned between the first side area and the second side area, and is opposite to the third side area.

The embodiment of the invention describes that lengths of the first and second long sides LS1 and LS2 are longer than lengths of the first and second short sides SS1 and SS2 for the sake of brevity and ease of reading. However, the lengths of the first and second long sides LS1 and LS2 may be almost equal to the lengths of the first and second short sides SS1 and SS2.

In the following description, a first direction DR1 may be a direction parallel to the long sides LS1 and LS2 of the display device 100, and a second direction DR2 may be a direction parallel to the short sides SS1 and SS2 of the display device 100. Further, a third direction DR3 may be a direction vertical to the first direction DR1 and/or the second direction DR2.

In the embodiment disclosed herein, the first direction DR1 and the second direction DR2 may be commonly referred to as a horizontal direction. Further, the third direction DR3 may be referred to as a vertical direction. In another point of view, a side or a surface, on which the display device 100 displays an image, may be referred to as a front side or a front surface. When the display device 100 displays the image, a side or a surface, at which the image cannot be observed, may be referred to as a back side or a back surface. When the display device 100 is observed at the front side or the front surface, the first long side LS1 may be referred to as an upper side or an upper surface. In the same manner as the first long side LS1, the second long side LS2 may be referred to as a lower side or a lower surface. Further, the first short side SS1 may be referred to as a left side or a left surface, and the second short side SS2 may be referred to as a right side or a right surface.

Further, the first long side LS1, the second long side LS2, the first short side SS1, and the second short side SS2 may be referred to as edges of the display device 100. Positions where the first long side LS1, the second long side LS2, the first short side SS1, and the second short side SS2 meet one another may be referred to as corners. For example, a position where the first long side LS1 and the first short side SS1 meet each other may be referred to as a first corner C1; a position where the first long side LS1 and the second short side SS2 meet each other may be referred to as a second corner C2; a position where the second short side SS2 and the second long side LS2 meet each other may be referred to as a third corner C3; and a position where the second long side LS2 and the first short side SS1 meet each other may be referred to as a fourth corner C4.

In the embodiment disclosed herein, a direction from the first short side SS1 to the second short side SS2 or a direction from the second short side SS2 to the first short side SS1 may be referred to as a left-right direction LR. A direction from the first long side LS1 to the second long side LS2 or from the second long side LS2 to the first long side LS1 may be referred to as an up-down direction UD.

FIGS. 1 to 5 illustrate examples of a display device related to the present disclosure. Referring to FIGS. 1 and 2 , a display panel 110 is positioned in front of a display device 100 and can display an image. The display panel 110 includes a plurality of pixels and outputs the image while controlling color, brightness, and chroma of each pixel.

The display panel 110 is divided into an active area on which the image is displayed, and an inactive area on which the image is not displayed. The display panel 110 may include a front substrate and a back substrate that are positioned opposite each other with a liquid crystal layer interposed therebetween.

The front substrate may include a plurality of pixels each including red, green, and blue subpixels, and can generate an image corresponding to red, green, or blue color in response to a control signal. Further, the back substrate may include switching elements and can switch on and off pixel electrodes. For example, the pixel electrodes can change a molecule arrangement of the liquid crystal layer in response to a control signal received from the outside.

In addition, the liquid crystal layer includes a plurality of liquid crystal molecules, and the arrangement of the liquid crystal molecules can be changed depending on a voltage difference between the pixel electrode and a common electrode. The liquid crystal layer can also transfer light provided by a backlight unit 120 to the front substrate.

A front cover 105 covers at least a portion of a front surface and a side surface of the display panel 110. The front cover 105 may have a rectangular fame shape, in which a center portion is empty. Because the center portion of the front cover 105 is empty, an image displayed on the display panel 110 can be seen to the outside.

The front cover 105 may also include a front cover and a side cover. Namely, the front cover 105 may include the front cover at the front surface of the display panel 110 and the side cover at the side surface of the display panel 110. The front cover and the side cover may be separately configured, and one of the front cover and the side cover may be omitted. For example, the front cover can be omitted, and only the side cover can be absent in terms of a beautiful appearance of the display device 100.

A guide panel 117 is positioned in the rear of the display panel 110 and supports a portion of a back surface of the display panel 110. The guide panel 117 contacts an edge of the display panel 110 and is coupled to a frame 130.

The backlight unit 120 is positioned in the rear of the display panel 110 and includes a plurality of light sources. The light sources of the backlight unit 120 may be arranged in an edge type or a direct type. For the edge type backlight unit 120, a light guide plate or a light guide panel may be added.

The backlight unit 120 may be positioned in front of the frame 130. For example, the plurality of light sources can be disposed at a front surface of the frame 130. In this instance, the backlight unit 120 is commonly called the direct type backlight unit 120. The backlight unit 120 can also be driven in an entire driving method or a partial driving method, such as a local dimming method and an impulsive driving method. As shown, the backlight unit 120 may include an optical sheet 125 and an optical layer 123.

In particular, the optical sheet 125 disperses light of the light sources and may be configured as a plurality of layers. For example, the optical sheet 125 may include at least one prism sheet and/or at least one diffusion sheet. The optical sheet 125 may further include at least one coupling portion 125 d. The coupling portion 125 d can be coupled to the front cover 105 and/or a back cover 150.

Namely, the coupling portion 125 d can be directly coupled to the front cover 105 and/or the back cover 150. Alternatively, the coupling portion 125 d may be coupled to a structure coupled to the front cover 105 and/or the back cover 150. Namely, the coupling portion 125 d can be indirectly coupled to the front cover 105 and/or the back cover 150. Further, the optical layer 123 may include the light sources, etc. The optical layer 123 will be described in detail in the corresponding paragraphs.

The frame 130 supports the components constituting the display device 100. For example, the backlight unit 120 may be coupled to the frame 130. The frame 130 may be formed of a metal material, for example, an aluminum alloy.

In addition, the back cover 150 is positioned in the rear of the display device 100 and protects an inner configuration of the display device 100 from the outside. At least a portion of the back cover 150 can be coupled to the frame 130 and/or the front cover 105. The back cover 150 may also be an injection production formed of a resin material (or an injection molded resin material).

Referring to FIG. 3 , the backlight unit 120 may include the optical layer 123 including a substrate 122, at least one light assembly 124, a reflective sheet 126 and a diffusion plate 129, and the optical sheet 125 positioned in front of the optical layer 123. The configuration of the backlight unit 120 is not limited thereto. For example, one or more of the components constituting the backlight unit 120 may be omitted.

The substrate 122 may also be configured as a plurality of straps, extended in a first direction and spaced apart from one another by a predetermined distance in a second direction perpendicular to the first direction. At least one light assembly 124 may be mounted on the substrate 122. Further, the substrate 122 may have an electrode pattern for connecting an adaptor to the light assembly 124. For example, a carbon nanotube electrode pattern may be used for the electrode pattern. The substrate 122 may be formed of at least one of polyethylene terephthalate (PET), glass, polycarbonate (PC), and silicon. The substrate 122 may be a printed circuit board (PCB).

The light assemblies 124 may be disposed on the substrate 122 at predetermined intervals in the first direction. In addition, a diameter of the light assembly 124 may be greater than a width of the substrate 122. Namely, the diameter of the light assembly 124 may be greater than a length of the substrate 122 in a second direction.

The light assembly 124 may be one of a light emitting diode (LED) chip and a LED package having at least one LED chip. The light assembly 124 may also be configured as a colored LED emitting at least one of red, green, and blue light or a white LED. The colored LED can include at least one of a red LED, a green LED, and a blue LED.

Further, the light source included in the light assembly 124 may be a COB (chip-on board) type. The COB light source may be configured such that the LED chip as the light source is directly coupled to the substrate 122. Hence, a manufacturing process can be simplified, a resistance can be reduced, and thus a loss of energy due to heat decreases. Namely, the power efficiency of the light assembly 124 increases. The COB light source provides brighter lighting and can be manufactured to be thinner and lighter than a related art.

In addition, the reflective sheet 126 is positioned at a front surface of the substrate 122 and includes through holes 235, and the light assembly 124 is inserted into the through hole 235. The reflective sheet 126 reflects light emitted from the light assembly 124 forward and again reflects light reflected from the diffusion plate 129 toward the diffusion plate 129.

In addition, the reflective sheet 126 may include at least one of metal and metal oxide, each of which is a reflection material. The reflective sheet 126 may include metal and/or metal oxide having a high reflectance, for example, at least one of aluminum (Al), silver (Ag), gold (Au), and titanium dioxide (TiO₂).

The reflective sheet 126 can also be formed by depositing and/or coating the metal or the metal oxide on the substrate 122. An ink including the metal material may also be printed on the reflective sheet 126. Further, a deposition layer may be formed on the reflective sheet 126 using a thermal deposition method, an evaporation method, or a vacuum deposition method such as a sputtering method. A coating layer and/or a printing layer can also be formed on the reflective sheet 126 using a printing method, a gravure coating method, or a silk screen method.

Further, an air gap may be positioned between the reflective sheet 126 and the diffusion plate 129 to serve as a buffer capable of widely spreading light emitted from the light assembly 124. A supporter (or support plate) 200 can be positioned between the reflective sheet 126 and the diffusion plate 129, so as to maintain the air gap. A resin may be deposited on the light assembly 124 and/or the reflective sheet 126 to diffuse light emitted from the light assembly 124. The diffusion plate 129 also diffuses light emitted from the light assembly 124 upwardly.

In addition, the optical sheet 125 may be positioned in front of the diffusion plate 129 with a back surface of the optical sheet 125 facing the diffusion plate 129, and a front surface of the optical sheet 125 facing the back surface of the display panel 110.

The optical sheet 125 may include at least one sheet. More specifically, the optical sheet 125 may include one or more prism sheets and/or one or more diffusion sheets. The plurality of sheets included in the optical sheet 125 can also be attached and/or adhered to one another.

In other words, the optical sheet 125 may include a plurality of sheets having different functions. For example, the optical sheet 125 may include first to third optical sheets 125 a to 125 c. The first optical sheet 125 a can function as a diffusion sheet, and the second and third optical sheets 125 b and 125 c can function as a prism sheet. A number and/or a position of the diffusion sheets and the prism sheets can also be changed.

The diffusion sheet can prevent light coming from the diffusion plate 129 from being partially concentrated and can more uniformly distribute the light. The prism sheet can concentrate light coming from the diffusion sheet and make the concentrated light be vertically incident on the display panel 110.

In addition, the coupling portion 125 d may be formed on at least one of a side and an edge of the optical sheet 125. The coupling portion 125 d may be formed on at least one of the first to third optical sheets 125 a to 125 c. The coupling portion 125 d may be formed at a long side or an edge of the optical sheet 125. The coupling portion 125 d on a first long side and the coupling portion 125 d on a second long side may be asymmetrical to each other. For example, a number and/or a position of the coupling portions 125 d on the first long side may be different from a number and/or a position of the coupling portions 125 d on the second long side.

Referring next to FIG. 4 , the substrate 122 including the plurality of straps, which is extended in the first direction and are spaced apart from one another by a predetermined distance in the second direction perpendicular to the first direction, may be provided on the frame 130. One end of each of the plurality of substrates 122 may be connected to a wire electrode 232. The wire electrode 232 may be extended in the second direction and connected to the ends of the substrates 122 at predetermined intervals in the second direction.

Further, a wire hole 234 can be formed at one end of the wire electrode 232. The wire hole 234 may be a fine hole penetrating the frame 130. The wire electrode 232 can be extended to a back surface of the frame 130 through the wire hole 234. The wire electrode 232 can also be electrically connected to an adaptor positioned at the back surface of the frame 130 through the wire hole 234.

The light assemblies 124 can also be mounted on each substrate 122 (or each strap) at predetermined intervals in the first direction. A diameter of the light assembly 124 may be greater than a width of the substrate 122 in the second direction.

Referring to FIG. 5 , the wire electrode 232 extending from the front surface of the frame 130 through the wire hole 234 can be electrically connected to a power supply board 315. The power supply board 315 may be a printed circuit board supplying electric power to the display device 100 and can convert AC power into DC power.

Further, the power supply board 315 can supply an electric current to the light assembly 124 through the wire electrode 232. The power supply board 315 can be electrically connected to a main board 321 through the wire electrode 232. In addition, the main board 321 may be spaced apart from the power supply board 315 by a predetermined distance.

The main board 321 can also be a printed circuit board providing an interface for operating the display device 100. Further, the main board 321 can check and control an operation state of each of the components of the display device 100.

The power supply board 315 and the main board 321 can be electrically connected to a timing controller board 319 through the wire electrode 232. The timing controller board 319 may be a printed circuit board transmitting electric power or signals received from the power supply board 315 or the main board 321 to the display panel 110. The timing controller board 319 can also be electrically connected to the display panel 110 positioned in front of the frame 130 through flat flexible cables 251.

FIG. 5 illustrates that the printed circuit boards are connected to one another, by way of example. However, embodiments are not limited thereto. For example, only at least a portion of each printed circuit board may be connected to one another.

Next, FIGS. 6 to 9 illustrate examples of a frame according to one embodiment. Referring to FIG. 6 , the frame 130 provides a space for accommodating the above-described components or components to be described later. The frame 130 includes a flat portion 130B, an inclined portion 130DL, and a flange 130P. One plate may be pressed to form the flat portion 130B, the inclined portion 130DL, and the flange 130P of the frame 130.

The flat portion 130B can form an entire bottom of the frame 130 and be bent or stepped to provide rigidity for the frame 130. Alternatively, the flat portion 130B may have a stepped portion to support or fix the components.

The frame 130 may have trenches 132, 134 and 136 formed on the flat portion 130B. Each of the trenches 132, 134 and 136 may be formed on the flat portion 130B in the left-right direction LR. The trenches 132, 134 and 136 can also be formed by pressing the frame 130 or the flat portion 130B.

Further, the plurality of trenches 132, 134 and 136 may be formed and arranged in the up-down direction UD. For example, the first trench 134 can be formed in the center of the flat portion 130B, the second trench 132 can be formed on the flat portion 130B above the first trench 134, and the third trench 136 can be formed on the flat portion 130B below the first trench 134.

In addition, the first trench 134 can have a different width from the second trench 132 and/or the third trench 136. A width of the second trench 132 can be the same as or similar to a width of the third trench 136. Namely, one of the plurality of trenches 132, 134 and 136 can have a different width from another of the plurality of trenches 132, 134 and 136.

Further, the inclined portion 130DL can be extended from an edge of the flat portion 130B and include a plurality of inclined portions 130DL1 to 130DL4. The plurality of inclined portions 130DL1 to 130DL4 can be extended from edges of the flat portion 130B. For example, the first inclined portion 130DL1 can be extended from the upper edge of the flat portion 130B, the second inclined portion 130DL2 can be extended from the left edge of the flat portion 130B, the third inclined portion 130DL3 can be extended from the lower edge of the flat portion 130B, and the fourth inclined portion 130DL4 can be extended from the right edge of the flat portion 130B. In this instance, the plurality of inclined portions 130DL1 to 130DL4 can have different inclinations.

The flange 130P can be extended from the inclined portion 130DL. For example, a first flange 130P1 can be extended from the first inclined portion 130DL1, a second flange 130P2 can be extended from the second inclined portion 130DL2, a third flange 130P3 can be extended from the third inclined portion 130DL3, and a fourth flange 130P4 can be extended from the fourth inclined portion 130DL4.

Referring to FIG. 7A, a projection can be positioned in the trenches 132, 134 and 136. A plurality of projections can be positioned in the trenches 132, 134 and 136. In this instance, a number of projections can vary depending on a position of the trenches 132, 134 and 136 in the flat portion 130B. For example, the first trench 134 can include a row of projections 1341 that are sequentially arranged in the left-right direction LR, the second trench 132 can include two rows of projections 1321 and 1322 that are sequentially arranged in the left-right direction LR, and the third trench 136 can include two rows of projections 1361 and 1362 that are sequentially arranged in the left-right direction LR.

Referring to FIG. 7B, a projection can be positioned in the flat portion 130B. A plurality of projections can also be positioned in the flat portion 130B. Namely, the projections illustrated in FIG. 7A can be arranged in the flat portion 130B from which the trenches 132, 134 and 136 are removed.

A first row of projections 1322 can be arranged adjacent to the first inclined portion 130DL1 along the first inclined portion 130DL1 or a first long side 130LS1 of the frame 130, and a second row of projections 1321 can be arranged adjacent to the first row of projections 1322 along the first inclined portion 130DL1 or the first long side 130LS1 of the frame 130.

Further, a fourth row of projections 1361 can be arranged adjacent to the third inclined portion 130DL3 along the third inclined portion 130DL3 or a second long side 130LS2 of the frame 130, and a fifth row of projections 1362 can be arranged adjacent to the fourth row of projections 1361 along the third inclined portion 130DL3 or the first long side 130LS1 of the frame 130.

A third row of projections 1341 can be arranged between the second row of projections 1321 and the fifth row of projections 1362 along the first and second long sides 130LS1 and 130LS2 of the frame 130 or the left-right direction LR. In this instance, the third row of projections 1341 can be arranged in the center of the flat portion 130B of the frame 130 along the left-right direction LR of the frame 130.

Referring to FIG. 8 , a projection 1341 can be formed in the first trench 134. A plurality of projections 1341 can also be sequentially formed along a longitudinal direction (i.e., the left-right direction LR) of the first trench 134. The first trench 134 can have a predetermined width W1 and a predetermined depth D1, and the projection 1341 can have a predetermined height H. The height H of the projection 1341 can correspond to the depth D1 of the first trench 134. Namely, the height H of the projection 1341 can be substantially the same as the depth D1 of the first trench 134. The projection 1341 can be positioned in the center (based on the up-down direction UD) of a bottom surface of the first trench 134.

Referring to FIG. 9 , the third trench 136 can have a predetermined width W3 and a predetermined depth D3. The predetermined depth D3 of the third trench 136 can be equal to or slightly different from the depth D1 of the first trench 134. The width W3 of the third trench 136 can be different from the width W1 of the first trench 134. The width W3 of the third trench 136 can be greater than the width W1 of the first trench 134. For example, the width W3 of the third trench 136 can be more than two times the width W1 of the first trench 134.

Projections 1361 and 1362 can be sequentially formed along a longitudinal direction (i.e., the left-right direction LR) of the third trench 136. In this instance, the projections 1361 and 1362 can be arranged in a plurality of rows. The projections 1361 and 1362 can be formed in pairs. The projections 1361 and 1362 can form a pair, and a plurality of pairs of projections 1361 and 1362 can be sequentially formed along the longitudinal direction of the third trench 136.

A pair of projections 1361 and 1362 can be arranged in a width direction (i.e., the up-down direction UD) of the third trench 136. Namely, one projection 1362 of the pair of projections 1361 and 1362 can be formed close to the first trench 134 on a bottom surface of the third trench 136, and the other projection 1361 can be formed close to the third inclined portion 130DL3 on the bottom surface of the third trench 136. A distance DP between the pair of projections 1361 and 1362 can be more than two times a half of a width of the substrate 122 described above or below. The description of the third trench 136 can be equally applied to the second trench 132.

FIGS. 10 to 17 illustrate examples of coupling light sources according to one embodiment. Referring to FIGS. 10 and 11 , a coupling groove 122 h can be formed on the substrate 122 in an elongated shape on the substrate 122. The coupling groove 122 h can be extended along a longitudinal direction of the substrate 122 and have a circular insertion groove 122R at one end.

Further, a projection 1341 can have a head HD smaller than a diameter d of the insertion groove 122R. The head HD of the projection 1341 can also be formed to be larger than a width w of the coupling groove 122 h. Hence, the projection 1341 can be inserted into the insertion groove 122R and can couple the substrate 122 to the frame 130 while sliding along the coupling groove 122 h.

Referring to FIG. 12 , a coupling groove 122 h can be formed on the substrate 122 in an elongated shape on the substrate 122. The coupling groove 122 h can be extended along the longitudinal direction of the substrate 122 and have a circular insertion groove 122R at one end.

Further, the coupling groove 122 h can include guides 122G1 and 122G2 formed inside the coupling groove 122 h. The first guide 122G1 can protrude from an inner surface of the coupling groove 122 h and can be formed along a longitudinal direction of the coupling groove 122 h. The second guide 122G2 can also face the first guide 122G1. In this instance, the second guide 122G2 can protrude from the inner surface of the coupling groove 122 h and can be formed along the longitudinal direction of the coupling groove 122 h.

A projection 1341 can have a head HD smaller than a diameter d of the insertion groove 122R. The head HD of the projection 1341 can be formed to be larger than a width w of the coupling groove 122 h formed by the guides 122G1 and 122G2. Hence, the projection 1341 can be inserted into the insertion groove 122R and can couple the substrate 122 to the frame 130 while sliding along the coupling groove 122 h and the guides 122G1 and 122G2.

Referring to FIG. 13 , a projection 1341 does not protrude to the outside of the substrate 122 and is positioned inside a coupling groove 122 h. A head HD of the projection 1341 can be positioned on an upper surface of a first guide 122G 1 and contact a portion of the upper surface of the first guide 122G1. Hence, the reflective sheet 126 described above or below can be placed flat on the substrate 122. A height of the projection 1341 can also be equal to or less than a thickness of the substrate 122.

Referring to FIG. 14 , the substrate 122 and/or the light assembly 124 can be positioned in the first trench 134. Also, a depth D1 of the first trench 134 can be substantially the same as the thickness of the substrate 122. The substrate 122 and/or the light assembly 124 can be fixed or attached to the first trench 134. In addition, an adhesive member AD can fix or attach the substrate 122 to the first trench 134. For example, the adhesive member AD can be a double-sided tape. The depth D1 of the first trench 134 can also be substantially the same as a sum of thicknesses of the substrate 122 and the adhesive member AD. Namely, the light assembly 124 can seem to be placed on the flat portion 130B of the frame 130 when viewed from the side. The first trenches 134 can have a depth capable of accommodating the substrate 122 and/or the adhesive member AD.

Further, the width W1 of the first trench 134 can be substantially equal to or greater than the width of the substrate 122. The width W1 of the first trench 134 can also be substantially equal to or less than an outer diameter of the light assembly 124.

Referring to FIG. 15 , the third trench 136 provides a space capable of accommodating the plurality of substrates 122 and has an area capable of arranging the plurality of the substrates 122 at one time. In this instance, the substrate 122 and/or the light assembly 124 can be biased to one side in an entire portion of the third trench 136. Namely, a position of the substrate 122 and/or the light assembly 124 on the third trench 136 can be changed.

The substrate 122 and/or the light assembly 124 on the third trench 136 can be disposed closer to the first trench 134. Alternatively, the substrate 122 and/or the light assembly 124 on the third trench 136 can be disposed closer to the third inclined portion 130DL3. This means that a distance between the light sources of the backlight unit can be adjusted.

For example, the substrate 122 and/or the light assembly 124 can be extended in the left-right direction LR and can be biased to an upper side of the third trench 134 based on the up-down direction UD. Alternatively, the substrate 122 and/or the light assembly 124 can be biased to a lower side of the third trench 134 based on the up-down direction UD.

Referring to FIG. 16 , projections 1361 and 1362 can be positioned on the third trench 136 and protrude from a bottom surface of the third trench 136. The first projection 1361 can be positioned on the third trench 136 close to the third inclined portion 130DL3, and the second projection 1362 can be positioned on the third trench 136 close to the first trench 134. Namely, the first projection 1361 and the second projection 1362 can be positioned sequentially or in series in the up-down direction UD.

When the substrate 122 and/or the light assembly 124 are/is coupled to the third trench 134, the substrate 122 can be inserted into the first projection 1361. The second projection 1362 can also be positioned next to the substrate 122 and/or the light assembly 124 and can protrude from the bottom surface of the third trench 136. Namely, the substrate 122 can be inserted into or coupled to the first projection 1361 or the second projection 1362.

Referring to FIG. 17 , the first trench 134 can include a row of projections 1341. The row of projections 1341 can seem like one projection when viewed from a cross-section of the frame 130. In addition, the second trench 132 can include two rows of projections 1321 and 1322 that seem like two projections when viewed from the cross-section of the frame 130.

Further, a height H1 of the first projection 1321 can be substantially the same as a height H2 of the second projection 1322, and a depth D2 of the second trench 132 can be substantially the same as the height H1 of the first projection 1321. A distance DP between the first projection 1321 and the second projection 1322 can also be larger than the width of the substrate 122.

Next, FIGS. 18 to 21 illustrate examples of a frame according to one embodiment. Referring to FIG. 18 , the frame 180 can include a skeleton 130F formed in a portion of the frame 130 in the up-down direction UD. The skeleton 130F of the frame 130 can be formed on the flat portion 130B of the frame 130 by a press.

Further, the frame 180 can include a plurality of skeletons 130F. For example, a first skeleton 130F1 and a second skeleton 130F2 can be disposed in the center of the flat portion 130B of the frame 130 in which the first skeleton 130F1 is positioned in parallel with the second skeleton 130F2. A third skeleton 130F3 and a fourth skeleton 130F4 can also be disposed on the side of the flat portion 130B of the frame 130 in which the third skeleton 130F3 is positioned in parallel with the fourth skeleton 130F4.

Further, the trenches 132, 134 and 136 can cross the skeletons 130F. In this instance, the skeletons 130F crossing the trenches 132, 134 and 136 can be further retracted to the rear of the flat portion 130B of the frame 130. A height difference formed by the flat portion 130B of the frame 130 and the skeletons 130F can be more than a height difference formed by the flat portion 130B of the frame 130 and the trenches 132, 134 and 136. Hence, the skeletons 130F can not affect the flatness of the substrate 122 coupled to the trenches 132, 134 and 136.

Referring to FIG. 20 , the frame 130 can include a flat portion 130B, an inclined portion 130DL1, a flange 130P1, and a sidewall 130SW. The inclined portion 130DL1 of the frame 130 can form a predetermined angle θ1 with the flat portion 130B of the frame 130. For example, the predetermined angle θ1 can be 45 degrees. In this instance, the inclined portion 130DL1 can be a first inclined portion 130DL1.

The frame 130 can include a support portion 130SHP1 and a hook portion 130HK. The support portion 130SHP1 can be formed on the flange 130P1 of the frame 130, and the hook portion 130HK can be formed on the flange 130P1 of the frame 130. In this instance, the flange 130P1 can be a first flange 130P1. The support portion 130SHP1 and the hook portion 130HK can seem to overlap each other when viewed from a cross section of the frame 130. In this instance, the support portion 130SHP1 can further protrude to the inside of the frame 130 than the hook portion 130HK. Namely, the inclined portion 130DL1 can be closer to the support portion 130SHP1 than the hook portion 130HK. The support portion 130SHP1 (or 130SH) can be referred to as a first rib, and the hook portion 130HK can be referred to as a second rib.

Referring to FIG. 21 , the frame 130 can include a flat portion 130B, an inclined portion 130DL4, a flange 130P4, and a sidewall 130SW. The inclined portion 130DL4 of the frame 130 forms a predetermined angle θ2 with the flat portion 130B of the frame 130. For example, the predetermined angle θ2 can be 60 degrees. In this instance, the inclined portion 130DL4 can be a fourth inclined portion 130DL4. In addition, the inclined portion 130DL4 can be a second inclined portion 130DL2 or a third inclined portion 130DL3.

The frame 130 can include a support portion 130SHP4 and a hook portion 130HK. The support portion 130SHP1 and the hook portion 130HK can be formed on the flange 130P4 of the frame 130. In this instance, the flange 130P4 can be a fourth flange 130P4. In addition, the flange 130P4 can be a second flange 130P2 or a third flange 130P3.

The support portion 130SHP1 and the hook portion 130HK may seem to overlap each other when viewed from a cross section of the frame 130. In this instance, the support portion 130SHP1 can further protrude to the inside of the frame 130 than the hook portion 130HK. Namely, the inclined portion 130DL4 can be closer to the support portion 130SHP1 than the hook portion 130HK.

Next, FIGS. 22 to 29 illustrate examples of the arrangement of light sources according to one embodiment. Referring to FIG. 22 , a first substrate 122A can be disposed on the first trench 134. A second substrate 122B can be disposed on the second trench 132. A third substrate 122C can be disposed on the third trench 136. The first substrate 122A, the second substrate 122B, and the third substrate 122C can be sequentially arranged in the up-down direction of the frame 130.

The second substrate 122B can be disposed on the upper side of the second trench 132. In other words, the second substrate 122B can be disposed on the second trench 132 at a location close to a first inclined portion 130DL1. The third substrate 122C can be disposed on the lower side of the third trench 136. In other words, the third substrate 122C can be disposed on the third trench 136 at a location close to a third inclined portion 130DL3.

Further, the second substrate 122B and the third substrate 122C can be separated from each other as far as possible within a range allowed by the second and third trenches 132 and 136. The first substrate 122A can be disposed in the center of the second substrate 122B and the third substrate 122C. The light assemblies 124 can be sequentially disposed on each of the substrates 122A, 122B and 122GB in the left-right direction. Hence, light provided by the light assemblies 124 can be uniformly distributed.

Referring to FIG. 23 , the light assembly 124 can be spaced apart from the first inclined portion 130DL1 by a predetermined distance. Further, the light assembly 124 can be spaced apart from the fourth inclined portion 130DL4 by a predetermined distance. The first inclined portion 130DL1 can form an inclination of about 45° with the flat portion 130B of the frame 130. Also, the fourth inclined portion 130DL4 can form an inclination of about 60° with the flat portion 130B of the frame 130.

In this instance, the light assembly 124 that is spaced apart from the fourth inclined portion 130DL4, can provide the effective optical characteristics even at a distance from the fourth inclined portion 130DL4 owing to an angle formed by the fourth inclined portion 130DL4 and the flat portion 130B of the frame 130. Namely, as the fourth inclined portion 130DL4 has a relatively steep inclination, light generated in the light assembly 124 can be uniformly distributed without forming a dark portion around the fourth inclined portion 130DL4.

Thus, the light assembly 124 can be spaced apart from the first inclined portion 130DL1 by a distance D1 shorter than a separation distance D3 between the light assembly 124 and the fourth inclined portion 130DL4 based on an angle between the first inclined portion 130DL1 and the flat portion 130B of the frame 130. Namely, the distance D1 can be less than the distance D3.

As the first inclined portion 130DL1 has a relatively gentle inclination, light provided by the light assembly 124 can form a dark portion around the first inclined portion 130DL1. However, as the distance between the light assembly 124 and the first inclined portion 130DL1 decreases, the optical characteristics can be improved. Namely, even when the first inclined portion 130DL1 has the relatively gentle inclination, light generated in the light assembly 124 can be uniformly distributed without forming a dark portion around the first inclined portion 130DL1.

Referring to FIG. 24 , the reflective sheet 126 can be positioned in front of the frame 130 and/or substrates 122A, 122B and 122C (see FIG. 23 ), and the reflective sheet 126 can have through holes 235 (see FIG. 3 ). The upper part and/or the side of the light assembly 124 can be positioned on the front surface of the reflective sheet 126 through the through holes 235. FIG. 24 illustrates an example where the substrates 122A, 122B and 122C shown in FIG. 22 are disposed in three rows.

Referring to FIG. 25 , a first substrate 122A can be disposed on the second trench 132, and a second substrate 122B can be disposed on the third trench 136. The first substrate 122A and the second substrate 122B can also be sequentially arranged in the up-down direction of the frame 130.

Further, the first substrate 122A can be disposed on the lower side of the second trench 132. In other words, the first substrate 122A can be disposed on the second trench 132 at a position away from the first inclined portion 130DL1. The second substrate 122B can also be disposed on the upper side of the third trench 136. In other words, the second substrate 122B can be disposed on the third trench 136 at a position away from the third inclined portion 130DL3. In another aspect, the first substrate 122A on the second trench 132 can be disposed as close as possible to the first trench 134, and the second substrate 122B on the third trench 136 can be disposed as close as possible to the first trench 134.

Further, the first substrate 122A and the second substrate 122B can be disposed as close as possible to each other within a range allowed by the trenches 132 and 136. Further, the light assemblies 124 can be sequentially arranged on each substrate 122 in the left-right direction. Hence, although the substrate 122 and/or the light assembly 124 are omitted in the first trench 134, light provided by the light assemblies 124 can be uniformly distributed.

Referring to FIG. 26 , the reflective sheet 126 can be positioned in front of the frame 130 and/or substrates 122A and 122B (see FIG. 25 ) and can have through holes 235 (see FIG. 3 ). The upper part and/or the side of the light assembly 124 can be positioned on the front surface of the reflective sheet 126 through the through holes 235. FIG. 26 illustrates an example where the substrates 122A and 122B shown in FIG. 25 are disposed in two rows.

Referring to FIGS. 27 and 28 , the first substrate 122A can be disposed on the lower side of the second trench 132, and the second substrate 122B can be disposed on the upper side of the third trench 136. Further, the first substrate 122A and the second substrate 122B can be disposed as close as possible to each other inside the trenches 132 and 136.

The light assembly 124 can include a lens extended in the up-down direction UD. When the substrate 122A and/or the light assembly 124 are positioned on the lower side of the second trench 132, the light assembly 124 can be far from the first inclined portion 130DL1. When the light assembly 124 is far from the first inclined portion 130DL1, a dark portion can be formed around the first inclined portion 130DL1 by the first inclined portion 130DL1 having the relatively gentler inclination than the fourth inclined portion 130DL4.

In this instance, the light assembly 124 having the lens of a shape extended in the up-down direction UD can improve the optical characteristics around the first inclined portion 130DL1 in spite of a change in a position of the substrate 122A in the second trench 132. Namely, the light assembly 124 can maintain the uniform distribution of light around the first inclined portion 130DL1.

As the position of the substrate 122A changes, a distance D11 between the light assembly 124 and the first inclined portion 130DL1 and a distance D33 between the light assembly 124 and the fourth inclined portion 130DL4 can change. This change can lead to a change in the optical characteristics that form a dark portion and a bright portion, causing the deterioration of image quality. Even when the position of the substrate 122A changes, the light assembly 124 can provide light with the uniform distribution for the first inclined portion 130DL1 and the fourth inclined portion 130DL4 owing to a change in the shape of the lens of the light assembly 124.

Referring to FIG. 29 , the reflective sheet 126 can be positioned in front of the frame 130 and/or substrates 122A and 122B (see FIG. 27 ) and can have through holes 235 (see FIG. 3 ). The upper part and/or the side of the light assembly 124 can be positioned on the front surface of the reflective sheet 126 through the through holes 235.

Next, FIGS. 30 to 38 illustrate examples of the coupling and the arrangement of light sources according to one embodiment. Referring to FIGS. 30 and 31 , a first holder 430 can be positioned on the frame 130 such as being positioned on the flat portion 130B. The first holder 430 can be formed on the flat portion 130B and be positioned adjacent to the first inclined portion 130DL1. The first holder 430 can include a plurality of first holders 430. For example, the first holder 430 can form a row of first holders 430 in the left-right direction along the first long side LS1 of the frame 130 on the flat portion 130B of the frame 130.

The first holder 430 can have a protrusion 431. The first holder 430 can be fixed to the flat portion 130B. The protrusion 431 can protrude from the first holder 430 to the outside. One side of the substrate 122 can be placed on the first holder 430. The one side of the substrate 122 can be inserted into the first holder 430. The one side of the substrate 122 can be supported by the first holder 430 and the protrusion 431.

A second holder 440 can be positioned on the frame 130, and the second holder 440 can be positioned on the flat portion 130B. The second holder 440 can be formed on the flat portion 130B and be positioned between the first inclined portion 130DL1 and the first holder 430. The second holder 440 can also include a plurality of second holders 440. For example, the second holder 440 can form a row of second holders 440 in the left-right direction along the first long side LS1 of the frame 130 on the flat portion 130B of the frame 130.

In addition, the second holder 440 can have a protrusion 441. In particular, the protrusion 441 of the second holder 440 can be directed toward the protrusion 431 of the first holder 430. Namely, when the protrusion 431 of the first holder 430 is directed toward the upper side of the frame 130, the protrusion 441 of the second holder 440 can be directed toward the lower side of the frame 130. Hence, the substrate 122 can be fixed to the frame 130 by the first holder 430 and the second holder 440. In this instance, the first holder 430 and the second holder 440 can be alternately disposed. The first holder 430 and the second holder 440 can form a row C forming a pair.

Further, a plurality of first and second holders 430 and 440 of a first row C1 can be formed on the flat portion 130B adjacent to the first inclined portion 130DL1. A plurality of first and second holders 430 and 440 of a second row C2 can also be formed on the flat portion 130B adjacent to the third inclined portion 130DL3. Also, a plurality of first and second holders 430 and 440 of a third row C3 can be positioned between the plurality of first and second holders 430 and 440 of the first row C1 and the plurality of first and second holders 430 and 440 of the second row C2.

A plurality of first and second holders 430 and 440 of a fourth row C4 can be positioned between the plurality of first and second holders 430 and 440 of the first row C1 and the plurality of first and second holders 430 and 440 of the third row C3. Further, the plurality of first and second holders 430 and 440 of the fourth row C4 can be positioned adjacent to the plurality of first and second holders 430 and 440 of the first row C1.

A plurality of first and second holders 430 and 440 of a fifth row C5 can be positioned between the plurality of first and second holders 430 and 440 of the second row C2 and the plurality of first and second holders 430 and 440 of the third row C3. The plurality of first and second holders 430 and 440 of the fifth row C5 can be positioned adjacent to the plurality of first and second holders 430 and 440 of the second row C2.

Referring to FIG. 32 , a first substrate 122A can be mounted on a plurality of first and second holders 430 and 440 of a first row C1. A second substrate 122B can be mounted on a plurality of first and second holders 430 and 440 of a third row C3. A third substrate 122C can be mounted on a plurality of first and second holders 430 and 440 of a second row C2. Namely, the substrates 122A, 122B and 122C and the light assemblies 124 can be arranged in three rows.

Referring to FIG. 33 , a first substrate 122A can be mounted on a plurality of first and second holders 430 and 440 of a fourth row C4, and a second substrate 122B can be mounted on a plurality of first and second holders 430 and 440 of a fifth row C5. Namely, the substrates 122A and 122B and the light assemblies 124 can be arranged in two rows.

Referring to FIGS. 34 and 35 , a supporter 432 can face a first holder 430. The supporter 432 can be positioned above the first holder 430 based on the up-down direction of the frame 130. The supporter 432 can be positioned on the left side or the right side of a second holder 440 based on the left-right direction of the frame 130. The supporters 432 can be positioned on both sides of the second holder 440. Hence, when the substrate 122 is inserted into the first holder 430, the supporter 432 can support the substrate 122. Further, the supporter 432 can prevent the substrate 122 from being detached from the first holder 430 after the substrate 122 is inserted into the first holder 430. In this instance, the first holder 430 and the second holder 440 can be alternately disposed. The first holder 430 and the second holder 440 can form a row C forming a pair.

A plurality of first and second holders 430 and 440 of a first row C1 can be formed on the flat portion 130B adjacent to the first inclined portion 130DL1. Also, a plurality of first and second holders 430 and 440 of a second row C2 can be formed on the flat portion 130B adjacent to the third inclined portion 130DL3. Further, a plurality of first and second holders 430 and 440 of a third row C3 can be positioned between the plurality of first and second holders 430 and 440 of the first row C1 and the plurality of first and second holders 430 and 440 of the second row C2.

A plurality of first and second holders 430 and 440 of a fourth row C4 can be positioned between the plurality of first and second holders 430 and 440 of the first row C1 and the plurality of first and second holders 430 and 440 of the third row C3. Further, the plurality of first and second holders 430 and 440 of the fourth row C4 can be positioned adjacent to the plurality of first and second holders 430 and 440 of the first row C1.

A plurality of first and second holders 430 and 440 of a fifth row C5 can be positioned between the plurality of first and second holders 430 and 440 of the second row C2 and the plurality of first and second holders 430 and 440 of the third row C3. The plurality of first and second holders 430 and 440 of the fifth row C5 can be positioned adjacent to the plurality of first and second holders 430 and 440 of the second row C2.

Referring to FIGS. 36 and 37 , a first substrate 122A can be mounted on a plurality of first and second holders 430 and 440 of a first row C1. A second substrate 122B can be mounted on a plurality of first and second holders 430 and 440 of a third row C3. A third substrate 122C can be mounted on a plurality of first and second holders 430 and 440 of a second row C2. Namely, the substrates 122A, 122B and 122C and the light assemblies 124 can be arranged in three rows.

Referring to FIG. 38 , a first substrate 122A can be mounted on a plurality of first and second holders 430 and 440 of a fourth row C4, and a second substrate 122B can be mounted on a plurality of first and second holders 430 and 440 of a fifth row C5. Namely, the substrates 122A and 122B and the light assemblies 124 can be arranged in two rows. The substrates 122A, 122B and 122C can be fixed to the frame 130 using an adhesive member, for example, a double-sided tape.

FIGS. 39 to 46 illustrate examples of an edge of a frame according to one embodiment. Referring to FIG. 39 , a support portion 130SH can be positioned on the flange 130P of the frame 130 and be formed on a portion of the flange 130P of the frame 130. The support portion 130SH can also be formed by bending a portion of the flange 130P of the frame 130.

For example, the support portion 130SH can be formed by partially bending the flange 130P and the sidewall 130SW of the frame 130. Further, the flange 130P and the side wall 130SW of the frame 130 can be cut and bent to form the support portion 130SH. Hence, an empty space 1300P2 is formed between the support portion 130SH and the sidewall 130SW.

When an overall thickness of the frame 130 decreases, a thickness of the support portion 130SH included in the frame 130 can also decrease. This can lead to a reduction in rigidity of the support portion 130SH. Thus, the support portion 130SH can be spaced apart from an edge formed by the flange 130P and the sidewall 130SW by a predetermined distance and positioned inside the flange 130P. The support portion 130SH can also be positioned adjacent to the optical layer 123.

The support portion 130SH can be entirely bent and include protrusions 130SHP1 and 130SHP2. The protrusions 130SHP1 and 130SHP2 protrude from the sidewall 130SW toward the optical layer 123 and can be formed by pressing the support portion 130SH. A plurality of protrusions 130SHP1 and 130SHP2 can also be formed. Further, the first protrusion 130SHP1 can protrude to the inside of the frame 130, and the second protrusion 130SHP2 can protrude to the inside of the frame 130. The first protrusion 130SHP1 and the second protrusion 130SHP2 can also protrude at the same protrusion level. Namely, the first protrusion 130SHP1 and the second protrusion 130SHP2 can simultaneously support the side of the optical layer 123.

Further, the support portion 130SH can secure sufficient rigidity for supporting the optical layer 123 due to the overall shape of the support portion 130SH. Also, a hook portion 130HK can be positioned on the flange 130P of the frame 130 and be formed on a portion of the flange 130P of the frame 130. The hook portion 130HK can also be formed by bending a portion of the flange 130P of the frame 130.

In addition, the hook portion 130HK can be formed by partially bending the flange 130P and the sidewall 130SW of the frame 130. The flange 130P and the side wall 130SW of the frame 130 can be cut and bent to form the hook portion 130HK. Hence, an empty space 130OP1 can be formed between the hook portion 130HK and the sidewall 130SW.

Further, the hook portion 130HK can be spaced apart from an edge formed by the flange 130P and the sidewall 130SW by a predetermined distance and positioned inside the flange 130P. The hook portion 130HK can also be positioned adjacent to the optical layer 123. The sidewall 130SW positioned below the support portion 130SH or the hook portion 130HK can be bent or can form a stepped portion. Hence, the support portion 130SH and/or the hook portion 130HK can provide a clearance while maintaining the rigidity of the sidewall 130SW.

Referring to FIGS. 40 and 41 , the support portion 130SH can support the optical layer 123 and in particular can support the side of the optical layer 123. The optical layer 123 can be, for example, a diffusion plate. The protrusions 130SHP1 and 130SHP2 of the support portion 130SH can contact the side of the optical layer 123. Further, the support portion 130SH can support the optical sheet 125, and in particular support the side of the optical sheet 125. In this instance, the protrusions 130SHP1 and 130SHP2 of the support part 130SH can contact the side of the optical sheet 125. The optical sheet 125 can also be placed on the optical layer 123. In this instance, the coupling portion 125 d of the optical sheet 125 can be inserted into the hook portion 130HK.

As shown in FIG. 40 , the hook portion 130HK is inserted into the coupling portion 125 d to couple the optical sheet 125 to the to frame and sandwich the optical layer 123 between the optical sheet 125 and the flange 130P3. Further, as shown in FIG. 40 , the first and second protrusions 130SHP1 and 130SHP2 contact the sides surfaces of the optical layer 123 and the optical sheet 125 with other surfaces of the first and second protrusions 130SHP1 and 130SHP2 not contacting the side surfaces of the optical layer and the optical sheet. When an external forces is applied to the optical layer 123 and/or optical sheet 125, the support portion 130SH compresses to absorb the external force in which the other surfaces of the first and second protrusions 130SHP1 and 130SHP2 may then contact the side surfaces of the optical layer 123 and the optical sheet 125.

Referring to FIGS. 42 and 43 , the hook portion 130HK can be spaced apart from the optical layer 123 such that a gap G can be formed between the hook portion 130HK and the optical layer 123. The gap G can be, for example, about 0.5 millimeters. The hook portion 130HK can fix the optical sheet 125 while maintaining the gap G from the optical layer 123.

The optical layer 123 can be supported by the support portion 130SH. When the support portion 130SH supporting the optical layer 123 is collapsed due to an excessive load or an external force or an impact that can occur in the movement, the hook portion 130HK can be a secondary supporting mechanism for supporting the optical layer 123.

Referring to FIGS. 44 and 45 , the hook portion 130HK can be entirely bent. In addition, the hook portion 130HK can include protrusions 130HKP1 and 130HKP2. For example, the hook portion 130HK can protrude from the sidewall 130SW toward the optical layer 123. The protrusions 130HKP1 and 130HKP2 can also be formed by pressing the hook portion 130HK. A plurality of protrusions 130HKP1 and 130HKP2 can be formed. The first protrusion 130HKP1 can protrude to the inside of the frame 130, and the second protrusion 130HKP2 can protrude to the inside of the frame 130. The first protrusion 130HKP1 and the second protrusion 130HKP2 can also protrude at the same protrusion level. Namely, the first protrusion 130HKP1 and the second protrusion 130HKP2 can simultaneously support the side of the optical layer 123.

The hook portion 130HK can secure sufficient rigidity for supporting the optical layer 123 due to the overall shape of the hook portion 130HK. Further, even when an external force or an impact is applied to the optical layer 123 supported by the hook portion 130HK and the support portion 130SH, a fixed state of the optical layer 123 can be maintained. Namely, the durability of the display device 100 can be further improved.

Referring to FIG. 46A, the support portion 130SH can be formed at a location adjacent to a corner C. For example, a first support portion 130SH1 can be positioned on the second long side LS2 and can be adjacent to a third corner C3. A second support portion 130SH2 can be positioned on the second long side LS2 and can be adjacent to a fourth corner C4. A third support portion 130SH3 can be positioned on the first long side LS1 and can be adjacent to a second corner C2. A fourth support portion 130SH4 can be positioned on the first long side LS1 and can be adjacent to a first corner C1.

A fifth support portion 130SH5 can be positioned on the second short side SS2 and can be adjacent to the second corner C2. A sixth support portion 130SH6 can be positioned on the second short side SS2 and can be adjacent to the third corner C3. A seventh support portion 130SH7 can be positioned on the first short side SS1 and can be adjacent to the first corner C1. An eighth support portion 130SH8 can be positioned on the first short side SS1 and can be adjacent to the fourth corner C4. In this instance, the fifth to eighth support portions 130SH5 to 130SH8 can be omitted.

Referring to FIG. 46B, the support portion 130SH can be formed at a location adjacent to a corner C. For example, a first support portion 130SH1 can be positioned on the second long side LS2 and can be adjacent to a third corner C3. A second support portion 130SH2 can be positioned on the second long side LS2 and can be adjacent to a fourth corner C4. A third support portion 130SH3 can be positioned on the first long side LS1 and can be adjacent to a second corner C2. A fourth support portion 130SH4 can be positioned on the first long side LS1 and can be adjacent to a first corner C1.

A fifth support portion 130SH5 can be positioned in the center of the second short side SS2. A sixth support portion 130SH6 can be positioned in the center of the first short side SS1. In this instance, the fifth support portion 130SH5 and/or the sixth support portion 130SH6 can be omitted. A number or a position of hook portions 130HK described above can be changed.

FIGS. 47 and 48 illustrate examples of a display device according to one embodiment. Referring to FIG. 47 , the optical layer 123 can be positioned in front of the frame 130. The optical layer 123 can be placed on the flange 130P3 of the frame 130. In this instance, the optical layer 123 can be spaced apart from the hook portion 130HK. A gap G can be formed between the optical layer 123 and the hook portion 130HK.

The optical sheet 125 can be positioned in front of the optical layer 123. The optical sheet 125 can be placed on the front surface of the optical layer 123. The back surface of the optical sheet 125 can contact the front surface of the optical layer 123. In this instance, the coupling portion 125 d of the optical sheet 125 can be inserted into the hook portion 130HK, and thus a position of the optical sheet 125 can be fixed.

The guide panel 117 can be positioned adjacent to the side and/or the front surface of the frame 130. The guide panel 117 can include a horizontal portion 117H and a vertical portion 117V. The horizontal portion 117H can be positioned in front of the flange 130P3 of the frame 130. The horizontal portion 117H can be positioned on the front surface of the optical layer 123 and/or the optical sheet 125.

The horizontal portion 117H can include pressing portions 117P. A first pressing portion 117P1 can press a portion of the front surface or a portion of the periphery of the front surface of the optical layer 123 and/or the optical sheet 125. A second pressing portion 117P2 can press the coupling portion 125 d of the optical sheet 125. Hence, the optical layer 123 and/or the optical sheet 125 can be firmly coupled to the frame 130. The horizontal portion 11711 can have a groove 1171. The support portion 130SH or the hook portion 130HK can be inserted into the groove 1171. Thus, the guide panel 117 can be coupled to the frame 130. The vertical portion 117V can be positioned adjacent to the sidewall 130SW of the frame 130. The vertical portion 117V can face the sidewall 130SW of the frame 130. The vertical portion 117V can be extended from the horizontal portion 117H. An adhesive member AD can be fixed to a portion of a front surface of the horizontal portion 117H. The adhesive member AD can be, for example, a double-sided tape.

Referring to FIGS. 47 and 48 , the display panel 110 can be placed on the front surface of the horizontal portion 117H of the guide panel 117. The display panel 110 can be fixed to the guide panel 117 by the adhesive member AD. A member layer MB on one side of the display panel 110 can be extended toward the rear or the back surface of the frame 130 while winding the side of the frame 130 or the horizontal portion 117H and/or the vertical portion 117V of the guide panel 117. For example, the member layer MB can be a chip-on-film (COF) or a flexible printed circuit board (FPCB).

FIGS. 49 and 50 illustrate examples of fixing a member layer of a display device according to one embodiment. Referring to FIG. 49 , a holder 400 can be positioned in the rear of the frame 130. The holder 400 can be positioned on the back surface of the frame 130. The holder 400 can be positioned on a back surface of the inclined portion 130DL3 of the frame 130. When an overall thickness of the frame 130 is thin, the holder 400 can be positioned on the back surface of the frame 130. Further, when the overall thickness of the frame 130 is thick, the holder 400 can be positioned on the side of the frame 130 or the back surface of the inclined portion 130DL3. The thickness of the frame 130 can mean the size of the inclined portion 130DL3 (130DL).

The holder 400 can be fixed to the back surface of the inclined portion 130DL3 of the frame 130 by an adhesive member. The holder 400 can include a body 402, a clip 404, and an adhesive portion AD. The holder 400 can be fixed by attaching the adhesive portion AD to the back surface of the inclined portion 130DL3 of the frame 130. The adhesive portion AD can be, for example, a double-sided tape. A substrate 110PC can be, for example, an S-PCB and can be inserted into the holder 400.

Referring to FIG. 50 , a fixed position of the holder 400 can be distorted by an external force or an impact. When a position of the holder 400 is changed, a fixed position of the substrate 110PC can be also changed. In this instance, the member layer MB having a limited length can be damaged.

FIGS. 51 to 54 illustrate examples of fixing a member layer of a display device according to one embodiment. Referring to FIG. 51 , the holder 400 can include a body 402, a clip 404, a first hook 406, and a second hook 408. The clip 404 can be a material with elasticity, for example, a synthetic resin.

The clip 404 can include a palm 404 c, a first finger 404 a, and a second finger 404 b. The palm 404 c can be equal to or slightly larger than a width of the substrate 110PC. Namely, the palm 404 c can provide some clearance when the substrate 110PC is placed on the palm 404 c. The first finger 404 a can bend toward the second finger 404 b. The second finger 404 b can bend toward the first finger 404 a. The first finger 404 a can include an inclined portion 4041. The inclined portion 4041 of the first finger 404 a can provide a path into which the substrate 110PC is inserted. The second finger 404 b can include an inclined portion 4042. The inclined portion 4042 of the second finger 404 b can provide a path through which the substrate 101PC is inserted into the second finger 404 b in a state where the substrate 101PC is inserted into the first finger 404 a.

In other words, the first finger 404 a and the second finger 404 b can be extended from both ends of the palm 404 c. In this instance, the first finger 404 a and the second finger 404 b can bend so that they face each other. The first inclined portion 4041 can be formed at the first finger 404 a, and the second inclined portion 4042 can be formed at the second finger 404 b. The first inclined portion 4041 can be formed on a surface of the first finger 404 a facing the palm 404 c. The second inclined portion 4042 can be formed on a surface of the second finger 404 b which does not face the palm 404 c and faces the outside.

The first hook 406 can be positioned opposite the clip 404 with the body 402 interposed therebetween. For example, the first hook 406 can be entirely formed in a shape of an arrowhead or a wedge. The first hook 406 can include a column 406 a and a head 406 b. The column 406 a can protrude from one side or one surface of the body 402. The head 406 b can be formed on the column 406 a. The head 406 b can be formed on the top of the column 406 a. A diameter of the head 406 b can be greater than a diameter of the column 406 a.

Inclined portions 4061 and 4062 can be formed at the periphery or an edge of the head 406 b. Namely, the head 406 b can include a first inclined portion 4061 and a second inclined portion 4062. The first inclined portion 4061 can be positioned opposite the second inclined portion 4062. In a three-dimensional viewpoint, the first inclined portion 4061 can be connected to the second inclined portion 4062. Namely, the first inclined portion 4061 and the second inclined portion 4062 can be formed as a single surface.

The second hook 408 can include a vertical portion 408 a and a hook portion 408 b. The vertical portion 408 a can protrude from the body 402. The hook portion 408 b can bend in a different direction from a protruding direction of the vertical portion 408 a and can be extended from the vertical portion 408 a. For example, the second hook 408 can entirely have a hook shape.

Referring to FIGS. 52 to 54 , the frame 130 can have a fixing hole 130 h. The fixing hole 130 h can be formed in the back surface of the frame 130. The fixing hole 130 h can be formed in the inclined portion 130DL3 of the frame 130. A plurality of fixing holes 130 h can be formed in the inclined portion 130DL3 of the frame 130.

A first fixing hole 130 h 2 can be formed to pass through the inclined portion 130DL3. The first fixing hole 130 h 2 can be formed in a circular shape so that the first hook 406 can be inserted into the first fixing hole 130 h 2. A second fixing hole 130 h 1 can be formed adjacent to the first fixing hole 130 h 2. The second fixing hole 130 h 1 can be formed to pass through the inclined portion 130DL3. The second fixing hole 130 h 1 can be formed in a rectangular shape so that the second hook 408 can be inserted into the second fixing hole 130 h 1. The second fixing hole 130 h 1 can have a different shape from the first fixing hole 130 h 2. In this instance, the second fixing hole 130 h 1 can be formed larger than the second hook 408.

In the holder 400, the second hook 408 can be inserted into the second fixing hole 130 h 1, and then the first hook 406 can be inserted into the first fixing hole 130 h 2. Hence, the holder 400 fixed to the back surface of the frame 130 can be prevented from being distorted from its position or can be prevented from being detached from the frame 130. When the substrate 110PC is inserted into the holder 400, the substrate 110PC cannot move by an external force or an impact owing to a stable fixing of the holder 400. Further, a damage of the member layer MB can be prevented.

The display device according to the present disclosure provides several advantages such maintaining the initial image quality of the display device by improving the durability of the display device, varying an arrangement of light sources of a backlight unit, improving the light efficiency of the backlight unit, securing the structural rigidity of a slim frame, improving a support structure of an optical layer, improving the assembly convenience of a holder and prevent the detachment of the holder, and improving the durability of the display device against an external impact.

The foregoing embodiments are merely examples and are not to be considered as limiting the present disclosure. The present teachings can be readily applied to other types of methods and apparatuses. The features, structures, methods, and other characteristics of the embodiments described herein may be combined in various ways to obtain additional and/or alternative embodiments. Certain embodiments or other embodiments of the invention described above are not mutually exclusive or distinct from each other. Any or all elements of the embodiments of the invention described above may be combined or combined with each other in configuration or function.

Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art. 

What is claimed is:
 1. A display device comprising: a display panel; at least one light assembly; a diffusion plate behind the display panel; an optical sheet between the display panel and the diffusion plate and including a plurality of coupling portions; and a frame behind the diffusion plate, wherein the frame includes: a flange supporting a portion of a back surface of the diffusion plate; a plurality of first ribs extended from the flange, wherein each of the plurality of first ribs is configured to contact and support a respective side surface of the diffusion plate and a respective side surface of the optical sheet, the plurality of first ribs spaced apart and arranged along a periphery of the display panel; and a plurality of second ribs extended from the flange, wherein each of the plurality of second ribs is positioned to be spaced apart and to be further laterally outward from a side surface of the diffusion plate at a position where the each of the second ribs are located, wherein each of the plurality of second ribs are inserted into a corresponding coupling portion of the plurality of coupling portions of the optical sheet to couple the optical sheet to the frame.
 2. The display device of claim 1, wherein the plurality of first ribs comprises a bent portion of the frame.
 3. The display device of claim 1, wherein the plurality of second ribs includes at least one protrusion bent toward the diffusion plate.
 4. The display device of claim 1, wherein at least one of the plurality of first ribs and the plurality of second ribs comprise a cut-out and bent portion of the frame.
 5. The display device of claim 1, wherein a base of each of the plurality of first ribs where each first rib protrudes from the frame is at a same level as a base of each of the plurality of second ribs where each second rib protrudes from the frame.
 6. The display device of claim 1, wherein a height of each of the plurality of first and second ribs is greater than a combined height of the diffusion plate and the optical sheet.
 7. The display device of claim 1, wherein the frame further includes: a central portion; and an inclined portion forming a predetermined angle with the central portion, wherein the flange extends horizontally from the inclined portion and parallel to the central portion. 